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Modular Gas Analyzer QGS-08CN - Advanced China Suppliers & Factory Solutions for Gas Concentration Measurement
Measurement Principle
QGS-08CN modular gas analyzer is based on infrared photoacoustic method to realize multi-component detection. A variety of measurement modules can be optional to meet the requirements of measuring multiple gas concentrations. Available modules include infrared photoacoustic module, paramagnetic detection module, electrochemical detection module, thermal conductivity detection module or trace water detection module. Up to two thin-film microsound detection modules and a thermal conductivity or electrochemical (paramagnetic oxygen) module can be assembled simultaneously. According to the range, measurement accuracy, stability and other technical indicators, the analysis module is selected.
Technical Parameter
| Measuring component | CO、CO2、CH4、H2、O2 Etc. |
| Range | (0~100)% (Different specifications can be selected within this range) |
| Minimum range — CO | (0~50) × 10-6 |
| Minimum range — CO2 | (0~20) × 10-6 |
| Minimum range — CH4 | (0~300) × 10-6 |
| Minimum range — H2 | (0~2)% |
| Minimum range — O2 | (0~1)% |
| Minimum range — N2O | (0~50) × 10-6 |
| Zero drift | ±1% FS / 7d |
| Range drift | ±1% FS / 7d |
| Linear error | ±1% FS |
| Repeatability | ≤ 0.5% |
| Response time | ≤ 20s |
| Power | < 150W |
| Power supply | AC (220 ± 22) V 50Hz |
| Weight | About 50 Kg |
Instrument Characteristics
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Multiple analysis modules: A QGS-08CN analyzer can be loaded with up to 3 analysis modules. An analysis module includes the basic analysis unit and the necessary electrical components. Analysis modules with different measurement principles have different performance.
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Multi-component measurement: QGS-08CN analyzer with a time interval of 0.5…20 seconds (depending on the number of components measured and the basic measurement range) measures all components simultaneously.
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Touch screen: 7-inch touch screen can display real-time measurement curve, easy to operate, friendly interface.
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Concentration compensation: Can compensate the cross interference to each component.
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Status output: QGS-08CN has a total of 8 relay outputs, including zero calibration state, terminal calibration state, fault state, alarm state, etc. Users can choose the corresponding output position for a certain state output according to the actual situation.
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Data retention: When you perform calibration or other operations on the instrument, the instrument can maintain the data status of the current measurement value.
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Signal output: Standard current loop output, digital communication.(1) There are 4 analog measurement outputs (4…20mA). You can select a measurement component corresponding to a signal output, or you can select a measurement value output corresponding to multiple output channels.
(2) RS232, MODBUS-RTU that can be directly connected to the computer or DCS system. -
Intermediate range function: That is non-zero starting point measurement.
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Zero gas: For zero calibration, two different zero gas values can be set as nominal values. This allows you to calibrate different analysis modules that require different zero gases. You can also set negative values as nominal values to compensate for lateral sensitivity interference.
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Standard gas: For terminal calibration, you can set 4 different standard gas nominal values. You can also set which measurement components are calibrated with which standard gases.
Product Application
- Environmental monitoring such as emissions of air pollution sources
- Petroleum, chemical and other industrial control
- Agriculture, health care and scientific research
- Determination of gas content in various combustion tests in laboratory
- Air quality monitoring in public places
Frequently Asked Questions
QWhat measurement principle does the QGS-08CN modular gas analyzer use?
The QGS-08CN is based on the infrared photoacoustic method to achieve multi-component gas detection. It can also integrate paramagnetic, electrochemical, thermal conductivity, and trace water detection modules depending on application requirements.
QHow many analysis modules can be installed simultaneously in the QGS-08CN?
Up to 3 analysis modules can be loaded into a single QGS-08CN unit at the same time. This includes up to two thin-film microsound detection modules and one thermal conductivity or electrochemical (paramagnetic oxygen) module.
QWhat gases can the QGS-08CN detect?
The QGS-08CN can measure a wide range of gases including CO, CO₂, CH₄, H₂, O₂, N₂O, and others. The measurement range spans from trace-level concentrations (e.g., CO from 0~50 × 10⁻⁶) up to 100% by volume, with different specifications selectable.
QWhat communication interfaces does the QGS-08CN support?
The analyzer supports RS232 and MODBUS-RTU digital communication protocols, enabling direct connection to computers or DCS systems. It also provides 4 analog outputs (4…20mA) for integration with existing process control systems.
QWhat are the main application areas of the QGS-08CN gas analyzer?
The QGS-08CN is widely used in environmental monitoring for air pollution source emissions, petroleum and chemical industrial process control, agricultural and healthcare research, laboratory combustion analysis, and public place air quality monitoring.
QHow is calibration performed on the QGS-08CN?
The QGS-08CN supports flexible calibration with two configurable zero gas nominal values and up to 4 standard gas nominal values for terminal calibration. Users can assign specific standard gases to individual measurement components, and negative nominal values can be set to compensate for cross-sensitivity interference. During calibration, the instrument maintains the current measurement data output without interruption.